NVCC warning level

c++, cuda, nvcc

Solution

Quoting the CUDA COMPILER DRIVER NVCC reference guide, Section 3.2.8. "Generic Tool Options":

`--Werror kind` Make warnings of the specified kinds into errors. The following is the list of warning kinds accepted by this option:

`cross-execution-space-call` Be more strict about unsupported cross execution space calls. The compiler will generate an error instead of a warning for a call from a `__host__ __device__` to a `__host__` function.

Therefore, do the following:

Project -> Properties -> Configuration Properties -> CUDA C/C++ -> Command Line -> Additional Optics -> add --Werror cross-execution-space-call

This test program

#include <cuda.h>
#include <cuda_runtime.h>

void foo() { int a = 2;}

__host__ __device__ void test() {
    int tId = 1;
    foo();
}

int main(int argc, char **argv) { }

returns the following warning

warning : calling a __host__ function("foo") from a __host__ __device__ function("test") is not allowed

without the above mentioned additional compilation option and returns the following error

Error   3   error : calling a __host__ function("foo") from a __host__ __device__ function("test") is not allowed

with the above mentioned additional compilation option.

Problem

Original source